How many atheists?

It is difficult to know for certain how many atheists there are. It is not on the census polls.

Currently, atheists are estimated to be the largest minority in the USA at around 21%, but, no one can be certain of our exact population.

In many parts of the world being openly atheist is not acceptable and prevents easy acceptance with the local society for business, friendship or political office. In in some cultures it is a death sentence. Atheists in many regions tend to keep their opinions to themselves and blend in with the local theist population. The count of atheists is therefor suspect and probably lower than reality.